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	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<title>情书 TO 乖乖</title>
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		body{
			height: 100%;
			background-color:blue;
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		.content {
			width: 400px;
			margin: 0 auto;
			color: red;
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<body>
	<div class="content">
		<h1>I Love You GuaiGuai</h1>
	</div>
</body>
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